Regio- and Diastereoselective Copper-Catalyzed Carbometalation of Cyclopropenylsilanes
作者:Yair Cohen、Ilan Marek
DOI:10.1021/acs.orglett.9b03531
日期:2019.11.15
We therein report a regio- and diastereoselective copper-catalyzed carbometalation of enantioenriched readily available cyclopropenylsilanes as a synthetic tool to access a large family of stereodefined fully-(hexa)-substituted cyclopropanes.
A Copper-Catalyzed Method for the Facially Selective Addition of Grignard Reagents to Cyclopropenes
作者:Lian-an Liao、Joseph M. Fox
DOI:10.1021/ja0278234
日期:2002.12.1
A Cu-catalyzed method for the addition of Grignardreagents to 1-alkyl-3-hydroxymethylcyclopropenes and their MOM ethers is described. The face of addition is syn relative to the hydroxymethyl and alkoxymethyl groups. Excellent diastereoselectivity is observed for a range of alkyl, alkenyl, and alkynylmagnesium halides. The addition reactions create chiral all-carbon quaternary centers, and the cyclopropylmetals
描述了将格氏试剂添加到 1-烷基-3-羟甲基环丙烯及其 MOM 醚的 Cu 催化方法。相对于羟甲基和烷氧基甲基而言,加成是顺式的。对于一系列烷基、烯基和炔基卤化镁,观察到了出色的非对映选择性。加成反应产生手性全碳四元中心,产生的环丙基金属可以与亲电试剂反应产生高度官能化的环丙烷。
Copper-catalyzed silylation of cyclopropenes using (trifluoromethyl)trimethylsilane
作者:Euan A. F. Fordyce、Yi Wang、Thomas Luebbers、Hon Wai Lam
DOI:10.1039/b717568j
日期:——
A variety of cyclopropenes undergo direct silylation using (trifluoromethyl)trimethylsilane in the presence of a copper–bisphosphine catalyst; under these conditions, cyclopropenes that might otherwise undergo ring-opening are silylated efficiently.